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Speed of sound waves in air...

Speed of sound waves in air

A

is independet of temperature

B

increases with pressure

C

increases with increases in humidity

D

decreases with increase in humidity

Text Solution

Verified by Experts

The correct Answer is:
C
Due to presence of moisture density of air decreases.
We know that speed of sound in air is given by `v=sqrt((gammap)/(rho))`
For any air `gamma and p` are constants.
`" " vprop(1)/(sqrt(rho))` where `rho` is density of air.
`(v_(2))/(v_(1))=sqrt((rho_(2))/(rho_(1))`
where `rho_(1)` is density of dry air and `rho_(2)` is density of moist air.
As `" " rho_(2)ltrho_(1)=(v_(2))/(v_(1))gt1rArrv_(2)gtv_(1)`
Hence, speed of sound wave in air increases wiht in humidity.
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